CN1880419A - Fluid compositions for dual clutch transmissions - Google Patents

Abstract

An additive composition and lubricating fluid are disclosed that provide high steel-on-paper friction durability, good metal-metal extreme pressure performance characteristics and synchronizer performance. The lubricating fluid includes a base oil, a succinimide dispersant, a succinimide friction modifier, and a phosphonate. Also disclosed is a method for lubricating a dual clutch transmission employing a plurality of wet clutches, with the lubricating fluid of the disclosure.

Description

The fluid composition that is used for double clutch transmissions

Technical field

The present invention relates to lubricant and be used for lubricated method with automatic double-clutch device transmission mechanism of a plurality of humid clutches.

Background technology

The double clutch transmissions of many types (also claiming double clutch or double clutch transmissions) is known.Known double clutch transmissions uses dry clutch or humid clutch.Some use the double clutch transmissions of humid clutch to comprise fluid torque-converter.For example, the open EP1052421A in Europe disclosed a kind of multiple clutch system that is used for transmission mechanism on November 15th, 2000, had two mutual coaxial multiple-disk clutches, and each clutch coupling is distributed in two axles.These two clutch couplinges are set in the sealing chamber that contains lubricating oil.

Volkswagen for example, has adopted automatic double-clutch device transmission mechanism (DCT) in Europe.Improving gradually of the design performance of the lubricant of automatic driver and wet brake system and other dependence frictions requires the automatic driver fluid, is used for the fluid of wet brake system and prepares the automatic driver fluid and the corresponding of the design performance of the mixed additive (additive packages) (enriched material) that the wet brake fluid is used improved gradually.

DCT has automatic direct conversion wheel casing (DSG, Direct Shift Gearbox), and it is equipped with integrated double clutch.These DCT designs are used to provide fuel economy preferably.Yet these DCT are different from the automaticmanual transmission mechanism, because DCT does not generally comprise torque converter.Yet the cooperation of manual drive realizes by using two humid clutches.Therefore, the fluidic performance requriements of lubricated DCT comprises manual drive lubricant key element and automatic driver lubricant key element.For these DCT, one or more in the performance of the friction materials on the steel and the friction durability of steel on paper of synchronization, anti-extreme pressure, steel may be important.

Disclosed European patent application publication No. EP0020037 discloses a kind of lubricating oil composition, it comprises the additive of the amount of reducing friction, this additive is selected from succinimide and succinic diamide and its mixture that is replaced by the oil soluble aliphatic hydrocarbon, and wherein said hydrocarbon substituent comprises about 12-36 carbon atom.Disclose in following file and similarly be used for automatic driver fluidic friction modifiers, described file is a United States Patent (USP) 5,171,466; 5,312,555; 5,328,619; 5,358,652; 5,464,549; 5,505,868; 5,652,201; With 5,817,605.

Disclose in following file and use the lower molecular weight succinimide friction modifiers that is made by amine in the automatic driver fluid, described file is a United States Patent (USP) 5,750,476; 5,811,377; 5,840,662; 5,942,472; 6,225,266; With 6,337,309; With european patent application application number EP0975714.

Disclose in one or more following files in various functional fluids such as machine oil, automatic driver fluid, gear oil and power-driven gear fluid and used phosphonic acid ester, described file is a United States Patent (USP) 4,158,633; 4,325,827; With 3,206,401; UK Patent Application publication number GB1,247,541 and international disclosed patent application WO98/47989, WO90/09425 and WO90/09386.

Therefore, the method that needs improved lubricating composition in the art and use with automatic double-clutch device transmission mechanism (DCT).

Summary of the invention

Summary of the invention

In first aspect, the present invention relates to compositions of additives, it is used for the transmission mechanism fluid that automatic double-clutch device transmission mechanism uses.This additive comprises dispersion agent, friction modifiers and phosphonic acid ester at least.This additive can be used for the automatic driver fluid and satisfies this fluidic performance requriements of use in automatic double-clutch device transmission mechanism.

In one aspect of the method, this compositions of additives can combine with base oil so that the automatic driver fluid to be provided, and it can be used for satisfying the performance requriements of automatic double-clutch device transmission mechanism.

In one aspect of the method, the present invention relates to a kind of increase steel the friction on the steel, stabilized steel on steel friction and/or the method for good synchronizer performance is provided, it is by coming lubrication gear to realize with the lubrication gear composition, described lubrication gear composition comprises relatively large base oil and compositions of additives, as described herein.

In one aspect of the method, the present invention relates to a kind of method with the lubricated automatic double-clutch device transmission mechanism of lubricating composition, described lubricating composition comprises relatively large base oil and compositions of additives, as described herein.

Detailed Description Of The Invention

In first aspect, the present invention relates to a kind of transmission mechanism fluidic compositions of additives that is used for.This additive comprises dispersion agent, friction modifiers and phosphonic acid ester at least.This additive can be used for the automatic driver fluid and satisfies this fluidic performance requriements of use in for example double clutch transmissions (DCT).Embodiment of the present invention can show improved steel in friction on the steel and steel frictional behaviour level, anti-extreme pressure and the synchronizer performance on paper.Especially, the present invention helps to provide good synchronizer performance in the synchronous system of using the sintered liner for example can be used for the double clutch transmissions system or carbon lining.

An advantage of the present composition is that these compositions do not have zinc basically." do not have zinc basically " and be meant that the present composition can comprise the zinc as impurity, and dezincification or zn cpds can be used as less impurity and be present in beyond one or more in the component of the present composition, do not add metallic zinc or zn cpds and prepare these compositions.

In one embodiment, the present invention relates to a kind of method with the lubricated double clutch transmissions of lubricating fluid, this method comprises that described do not have the lubricating fluid of zinc to comprise basically: (a) ashless dispersant with the step of the lubricated double clutch transmissions of the lubricating fluid that does not have zinc basically; (b) friction modifiers; (c) phosphonic acid ester; (d) base oil;

Preferably, wherein this base oil comprises mixture, synthetic oil, the mixture of synthetic oil or the mixture of natural oil and synthetic oil of natural lubricating oil, natural lubricating oil;

Also preferably, wherein this dispersion agent comprises boron, and further preferably, wherein this boron-containing dispersant comprises the boron of the about 0.7wt% of about 0.1wt%-;

Also preferably, wherein this dispersion agent comprises three valent phosphors;

Also preferably, wherein in double clutch transmissions translating gear comprise and make the engagement and the local transmission shaft synchronization of non-engagement;

Also preferably, wherein this lubricating fluid comprises the compound of at least a sulfur-bearing further.

Also preferably, wherein this phosphonic acid ester is selected from the phosphonic acid ester with following chemical formula:

R wherein ¹Be alkyl or the alkenyl that comprises about 30 carbon atoms of about 12-, and R wherein ²And R ³Be hydrogen, alkyl or alkenyl independently of one another; Preferably, wherein this phosphonic acid ester is selected from triacontyl dimethyl phosphonate, triacontylene base dimethyl phosphonate, eicosyl dimethyl phosphonate, hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, 40 carbene base dimethyl phosphonates, hexacontyl dimethyl phosphonate, dodecyl dimethyl phosphonate, dodecenyl succinic dimethyl phosphonate, hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, octadecyl dimethyl phosphonate, vaccenic acid base dimethyl phosphonate and eicosyl dimethyl phosphonate; Preferably, wherein this phosphonic acid ester is selected from phosphonic acid ester, wherein R ¹Be alkyl or the alkenyl that contains about 16-20 carbon atom; Preferably, wherein this phosphonic acid ester comprises the octadecyl dimethyl phosphonate.

In another embodiment, the present invention relates to a kind of double clutch transmissions fluid, comprising: (a) ashless dispersant; (b) friction modifiers; (c) phosphonic acid ester; (d) base oil, wherein this double clutch transmissions fluid does not have zinc basically;

Preferably, wherein this base oil comprises mixture, synthetic oil, the mixture of synthetic oil or the mixture of natural oil and synthetic oil of natural lubricating oil, natural lubricating oil;

Also preferably, wherein this dispersion agent comprises boron, and further preferably, wherein this boron-containing dispersant comprises the boron of the about 0.7wt% of about 0.1wt%-;

Also preferably, wherein this dispersion agent comprises three valent phosphors;

Also preferably, wherein this phosphonic acid ester is selected from the phosphonic acid ester with following chemical formula:

R wherein ¹Be alkyl or the alkenyl that comprises about 30 carbon atoms of about 12-, and R wherein ²And R ³Be hydrogen, alkyl or alkenyl independently of one another; Preferably, wherein this phosphonic acid ester is selected from triacontyl dimethyl phosphonate, triacontylene base dimethyl phosphonate, eicosyl dimethyl phosphonate, hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, 40 carbene base dimethyl phosphonates, hexacontyl dimethyl phosphonate, dodecyl dimethyl phosphonate, dodecenyl succinic dimethyl phosphonate, hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, octadecyl dimethyl phosphonate, vaccenic acid base dimethyl phosphonate and eicosyl dimethyl phosphonate; Preferably, wherein this phosphonic acid ester is selected from phosphonic acid ester, wherein R ¹Be alkyl or the alkenyl that contains about 16-20 carbon atom; Preferably, wherein this phosphonic acid ester comprises the octadecyl dimethyl phosphonate;

Also preferably, wherein this lubricating composition comprises the compound of at least a sulfur-bearing further.

Dispersion agent

A component of compositions of additives of the present invention can be one or more conventional ashless dispersants.Suitable ashless dispersant is to have those of basic nitrogen and/or at least one hydroxyl in molecule, as succinimide dispersants, succinic diamide dispersion agent, succinate dispersion agent, succsinic acid ester-acid amide dispersion agent, Mannich base dispersion agent or alkylamine or polyamines dispersion agent.

The method of producing the ashless dispersant of the above-mentioned type is well known by persons skilled in the art and is reported in the patent documentation.For example, the synthetic of the various ashless dispersants of the above-mentioned type is described in for example following patent:

United States Patent (USP) 2,459,112; 2,962,442,2,984,550; 3,036,003; 3,163,603; 3,166,516; 3,172,892; 3,184,474; 3,202,678; 3,215,707; 3,216,936; 3,219,666; 3,236,770; 3,254,025; 3,271,310; 3,272,746; 3,275,554; 3,281,357; 3,306,908; 3,311,558; 3,316,177; 3,331,776; 3,340,281; 3,341,542; 3,346,493; 3,351,552; 3,355,270; 3,368,972; 3,381,022; 3,399,141; 3,413,347; 3,415,750; 3,433,744; 3,438,757; 3,442,808; 3,444,170; 3,448,047; 3,448,048; 3,448,049; 3,451,933; 3,454,497; 3,454,555; 3,454,607; 3,459,661; 3,461,172; 3,467,668; 3,493,520; 3,501,405; 3,522,179; 3,539,633; 3,541,012; 3,542,680; 3,543,678; 3,558,743; 3,565,804; 3,567,637; 3,574,101; 3,576,743; 3,586,629; 3,591,598; 3,600,372; 3,630,904; 3,632,510; 3,632,511; 3,634,515; 3,649,229; 3,697,428; 3,697,574; 3,703,536; 3,704,308; 3,725,277; 3,725,441; 3,725,480; 3,726,882; 3,736,357; 3,751,365; 3,756,953; 3,793,202; 3,798,165; 3,798,247; 3,803,039; 3,804,763; 3,836,471; 3,862,981; 3,936,480; 3,948,800; 3,950,341; 3,957,854; 3,957,855; 3,980,569; 3,991,098; 4,071,548; 4,173,540; 4,234,435; 5,137,980; 5,652,201; With Re 26,433, be incorporated herein by reference in this article.Other dispersion agents that are fit to are found in, for example, and United States Patent (USP) 5,198,133; 5,256,324; 5,389,273 and 5,439,606, be incorporated herein by reference in this article.

In some embodiments, this ashless dispersant can comprise one or more alkenyl succinimide of the amine with at least one primary amino that can form imide group.This alkenyl succinimide can be formed by ordinary method, as by Heating Chain alkenyl succinic anhydride, acid, acid-ester, acyl halide or have the lower alkyl esters of the amine that contains at least one primary amino.By heating polyolefine and maleic anhydride mixture, can easily prepare alkenyl succinic anhydrides to about 180-220 ℃.Polyolefine can be the polymkeric substance or the multipolymer of rudimentary monoolefine such as ethene, propylene, iso-butylene etc., and its number-average molecular weight is about 3000 for about 900-, and is definite by gel permeation chromatography (GPC).

The amine that can be used for forming ashless dispersant comprises any amine with at least one primary amino, and it can react to form imido grpup and at least one additional uncle or secondary amino group and/or at least one hydroxyl.Some typical examples are: N-methyl-propylene diamine, N-dodecyl propylene diamine, N-aminopropyl-piperazine, thanomin, N-ethanol-quadrol or the like.

Suitable amine can comprise alkylene polyamine, as propylene diamine, dipropylenetriamine, two-(1, the 2-butylidene) triamine and four-(propylene) five amine.Further example comprises the ethylidene polyamines, and it can be by formula H ₂N (CH ₂CH ₂NH) _nH describes, and wherein n can be the integer of about 1-about 10.These comprise: quadrol, diethylenetriamine, Triethylenetetramine (TETA), tetren, penten or the like, comprise its mixture, and in either case, n is the mean value of mixture.These described ethylidene polyamines have primary amine group at each end, so they can form mono-alkenyl succinimide and double-stranded alkenyl succinimide.Commercially available ethylidene polyamine mixture can comprise more a spot of branch material and annular material, as N-aminoethyl piperazine, N, and N '-two (aminoethyl) piperazine, N, N '-two (piperazinyl) ethane and similar compound.Commercial mixture can have proximate total composition, and it falls into and is equivalent to the scope of diethylenetriamine to tetren.The mol ratio of polyene-based succinyl oxide and polyalkylenepolyamines can be about 1: about 2.4: 1 of 1-.

Mannich Base ashless dispersants can be formed with the condensation of about 2.5 molar part formaldehyde of about 1-and the about 2 molar part polyalkylenepolyaminess of about 0.5-by the phenol that is replaced by long chain hydrocarbon of about 1 molar part.

In some embodiments, this ashless dispersant can comprise polyethylene polyamine (for example Triethylenetetramine (TETA) or tetren) and the carboxylic acid or anhydride that is replaced by hydrocarbon (its by the polyolefine of suitable molecular weight such as polyisobutene and undersaturated polycarboxylic acid or acid anhydride for example the reaction of (mixtures that comprise two or more this materials) such as maleic anhydride, toxilic acid, fumaric acids make) reaction product.

The content of dispersion agent can be the about 6wt% of about 1wt%-, based on the gross weight of lubricating composition.As further example, the content of this dispersion agent in lubricating composition (or finished product fluid) can be the about 4wt% of about 2wt%-.The content of dispersion agent in compositions of additives can be the about 60wt% of about 10wt%-.

Boron-containing dispersant

In certain embodiments, this compositions of additives can comprise at least a boron-containing dispersant, and wherein this boron-containing dispersant is without phosphorus.This boron-containing dispersant can be formed by the boronation effect (boration effect) of ashless dispersant, described ashless dispersant has basic nitrogen and/or at least one hydroxyl in molecule, as succinimide dispersants, succinic diamide dispersion agent, succinate dispersion agent, succsinic acid ester-acid amide dispersion agent, Mannich base dispersion agent or alkylamine or polyamines dispersion agent.Can be used for making the method for above-mentioned all kinds ashless dispersant boronation to be described in the following United States Patent (USP): 3,087,936; 3,254,025; 3,281,428; 3,282,955; 3,338,832; 3,344,069; 3,533,945; 3,658,836; 3,703,536; 3,718,663; 4,455,243; With 4,652,387.

In some embodiments, boron-containing dispersant can comprise for example polyisobutenyl succinimide or double amber imide or its mixture of boronation.The molecular weight of polyisobutene can be the about 1300amu of about 210-, as the about 900-1300amu of further example, as the about 1300amu of the about 1200-of example further.

Boron-containing dispersant can comprise the boron of the about 0.7wt% of about 0.1wt%-.As further example, boron-containing dispersant can comprise the boron of the about 0.7wt% of about 0.25wt%-.

Phosphorous dispersion agent

In certain embodiments, this compositions of additives can comprise at least a phosphorous dispersion agent, for example, and the dispersion agent of phosphorylation.The dispersion agent by making non-boronation or the dispersion agent phosphorylation of boronation can prepare this phosphorous dispersion agent.

When dispersion agent comprised three valent phosphors (phosphorous) and boron, this phosphorous and boron-containing dispersant can comprise polyisobutenyl succinimide or double amber imide or its mixture of phosphorylation and boronation.This phosphorous and boron-containing dispersant can comprise that molecular weight is the polyisobutene of about 900amu.Further, this phosphorous and boron-containing dispersant can comprise polyisobutenyl succinimide and boric acid (that is B (OH), ₃) and phosphorous acid (phosphorus acid) (that is H, ₃PO ₃).

In lubricating composition (finished product fluid), the content of boron and phosphorus can be about 200ppm of for example boron and phosphorus sum or more.As further example, in lubricating composition, the content of boron and phosphorus can be about 400ppm of for example boron and phosphorus sum or more.

Friction modifiers

Compositions of additives and/or lubricating composition can comprise the friction modifiers of friction improvement amount, as have improved steel in the friction on paper of the friction on the steel, steel and/or the amount of synchronization performance.

Be applicable to that friction modifiers of the present invention comprises this compound, as aliphatic aliphatic amide or alkoxylate aliphatic series aliphatic amide, alkoxylate aliphatic ether amine, aliphatic carboxylic acid, aliphatic fatty acid amide, alkoxylate aliphatic series fatty acid amide, aliphatic fatty tetrahydroglyoxaline and aliphatic fat tertiary amine, wherein aliphatic group comprises about carbon atom more than eight usually so that make this suitable ground of compound oil-soluble.The also suitable succinimide that is replaced by aliphatic series, its reaction by one or more aliphatic succsinic acids or acid anhydrides and ammonia or other primary amine forms, as instructs in EP-A-0389237, and the mixture of two or more friction modifiers.Be applicable to that friction modifiers of the present invention is described in the following United States Patent (USP), is incorporated herein by reference its disclosure that relates to friction modifiers: United States Patent (USP) 5,344,579 in this article; 5,372,735 and 5,441,656.

Suitable friction modifiers can be selected from one or more oil-soluble succinimide and its mixtures that is replaced by aliphatic hydrocarbon, and wherein said hydrocarbon substituent comprises about 12-36 carbon atom.Aliphatic substituting group on the succsinic acid group can be any aliphatic hydrocarbon groups that comprises about 12-36 carbon atom, comprises alkyl, alkenyl and polyunsaturated hydrocarbyl group.The example of these friction modifiers comprises: n-dodecyne base succinimide, l-methyl tridecyl succinimide, 2-ethyl tetradecyl succinimide, n-cetene base succinimide, n-octadecyl succinimide, n-vaccenic acid base succinimide, l-methyl eicosyl succinimide, n-two dodecenyl succinic succinimides, 4-ethyl triacontyl succinimide and n-cetene base succinimide.

In one embodiment, on secondary carbon(atom), aliphatic hydrocarbon groups can be bonded to the succsinic acid group.The chemical formula of these compounds is:

Wherein n is that small integer and the Z of about 2-about 4 are groups:

R wherein ₁And R ₂Be independently selected from the side chain or the straight chain hydrocarbon group that comprise about 34 carbon atoms of about 1-, make at R ₁And R ₂In in the sum of carbon atom be about 11-about 35.

The example of these friction modifiers is:

1-ethyl tetradecyl succinimide

L-methyl 15 carbene base succinimides

1,2-dimethyl vaccenic acid base succinic diamide

L-methyl-3-ethyl dodecenyl succinic succinimide

L-decyl-2-methyl dotriacontyl succinimide.

In another embodiment, R ₁And R ₂Can be the straight chain aliphatic hydrocarbon groups.These friction modifiers have improved solubleness in lubricating oil.The example of these friction modifiers is:

L-methyl pentadecyl succinimide

L-propyl group tridecylene base succinimide

L-amyl group tridecylene base succinimide

L-tridecyl 15 carbene base succinimides

L-tetradecyl eicosylene base succinimide.

Above-mentioned friction modifiers can be made by the linear alpha-alkene that comprises about 36 carbon atoms of about 12-, by making this alpha-olefin isomerization form mixtures of internal olefins, this mixtures of internal olefins and toxilic acid, acid anhydrides or ester reaction form a kind of intermediate product, and this intermediate product and ammonia react form acid amides, imines or its mixture and carry out.Compare with the friction modifiers of being made by linear alpha-alkene, the friction modifiers of being made by isomerized linear alpha-alkene has improved greatly oily solubility.

The isomerization of linear alpha-alkene can use ordinary method to carry out.A kind of suitable method is this linear alpha-alkene of heating and an acidic catalyst.Useful especially acid catalyst is sulfonated phenylethylene-divinyl benzene copolymer.This catalyzer is commercially available that get and usually as Zeo-karb.In the method, they use with its sour form.This resin is used to make the isomerized purposes of linear alpha-alkene to be described in United States Patent (USP) 4,108, and in 889, it is incorporated herein by reference in this article.

The present composition can comprise the mixture of two or more friction modifiers.For example, can use the mixture of one or more succinimide friction modifiers and one or more amine friction modifiers.

Phosphonic acid ester

Compositions of additives of the present invention can comprise one or more phosphonic acid esters, and it has chemical formula:

R wherein ¹Be alkyl or the alkenyl that comprises about 30 carbon atoms of about 12-, and R wherein ²And R ³Be hydrogen, alkyl or alkenyl independently of one another.As an example, suitable alkyl can comprise methyl, ethyl, propyl group, sec.-propyl, normal-butyl, the tertiary butyl, isobutyl-or its any combination.The example of these phosphonic acid esters is triacontyl dimethyl phosphonate, triacontylene base dimethyl phosphonate, eicosyl dimethyl phosphonate, hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, 40 carbene base dimethyl phosphonates, hexacontyl dimethyl phosphonate, dodecyl dimethyl phosphonate, dodecenyl succinic dimethyl phosphonate etc.

In one embodiment, R ¹Be alkyl or the alkenyl that comprises about 20 carbon atoms of about 16-.The example of these phosphonic acid esters is hexadecyl dimethyl phosphonate, cetene base dimethyl phosphonate, octadecyl dimethyl phosphonate, vaccenic acid base dimethyl phosphonate, eicosyl dimethyl phosphonate etc.

Suitable phosphonate ester monoesters and its preparation method are described in US2004-0230068.

This phosphonic acid ester is added in this lubricating composition with the amount of improving frictional behaviour, as has improved steel in the friction on paper of the friction on the steel, steel and/or the amount of synchronization performance.Suitable concentration can be the about 3wt% of about 0.05-.As further example, suitable concentration can be the about 0.6wt% of about 0.10wt%-.

Stain remover

In some embodiments, this compositions of additives also can comprise stain remover.This stain remover can comprise the stain remover of high alkalinity stain remover, boration and/or the high alkalinity stain remover of boration.This stain remover can comprise sulfonate or phenolate.Further, this stain remover can comprise calcic, contains magnesium or contain the compound of sodium.This stain remover can comprise for example calcium sulphonate, sulfonic acid magnesium, sodium sulfonate and/or calcium phenylate.For example, the calcium sulphonate stain remover can comprise the calcium of the about 20wt% of about 1.5wt%-, or the calcium of the further about 15wt% of the about 12wt%-of example of conduct.Further, the calcium sulphonate stain remover can comprise the total basicnumber (TBN) of the about 450mgKOH/g of about 3mgKOH/g-, is that about 250mgKOH/g arrives about 350mgKOH/g as further example for the about 400mgKOH/g of about 250mgKOH/g-with as example further.The calcium phenylate stain remover can comprise the calcium of the about 8.5wt% of about 2.5wt%-, or the calcium of about 5wt% for example.Further, the calcium phenylate calcium phenylate can comprise the TBN of the about 300mgKOH/g of about 50mgKOH/g-, or for example about 150mgKOH/g.

Embodiment can comprise except above-mentioned stain remover or substitute the basic metal stain remover and/or the alkaline-earth metal stain remover of above-mentioned stain remover.Suitable basic metal and alkaline-earth metal stain remover can comprise the oil-soluble neutrality or the overbasic salt of the following acidic substance of basic metal and alkaline-earth metal and one or more (or its mixture): sulfonic acid, carboxylic acid, Whitfield's ointment, alkylphenol and sulfenyl phenolate.

The washing composition of oil-soluble neutral alkali metal containing and alkaline-earth metal is that those comprise with respect to the basic metal of the stoichiometry equivalent amount of the amount of existing acidic moiety in the stain remover and the stain remover of alkaline-earth metal.Therefore, compare with its high alkalinity homologue usually, this neutrality basic metal and alkaline-earth metal stain remover have low basicity.The preparation method of the stain remover of high alkalinity alkali metal containing and alkaline-earth metal is well known in the art, and has many commercially available high alkalinity stain removers that get on market.

This basic metal and alkaline-earth metal stain remover including, but not limited to, neutral and high alkaline azochlorosulfonate acid sodium, carboxylic acid sodium, sodium salicylate, sodium phenylate, sulfuration sodium phenylate, calcium sulphonate, calcium carboxylates, calcium salicylate, calcium phenylate, sulfuration calcium phenylate, sulfonic acid lithium, carboxylic acid lithium, lithium salicylate, phenol lithium, sulfuration phenol lithium, sulfonic acid magnesium, magnesium carboxylates, magnesium salicylate, phenol magnesium, vulcanize phenol magnesium, potassium sulfonate, carboxylic acid potassium, potassium salicylate, potassium phenylate and sulfuration potassium phenylate.

This compositions of additives can combine with base oil power transmission fluids is provided.This power transmission fluids can comprise the finished product fluid.

In another embodiment, automatic driver fluid or double clutch transmissions fluid can be included in compositions of additives disclosed herein.This fluid is applicable to automatic double-clutch device transmission mechanism, as using the DCT of at least two humid clutches.In one embodiment, this transmission mechanism fluid can be used for not comprising the DCT of torque converter.

In another embodiment, increase steel the friction on the steel, stabilized steel on paper friction and/or provide the method for good synchronizer performance can comprise with contain relatively large base oil and as described herein the lubricating composition of compositions of additives come lubrication gear.

Can comprise other additives, as, for example, one or more anti-wear agents; Antioxidant or antioxidant system are as amine antioxidants or phenol antioxidant; Inhibitor or inhibitor system; Metal passivator; Rust-preventive agent; The friction modifiers that one or more are other; Dyestuff; Sealed expander; Antifoams; Tensio-active agent; Viscosity index improver; Perfume compound or reodorant; With its any suitable combination.

Sulfur component

In some embodiments, this compositions of additives also can comprise one or more sulfur component.For example, this compositions of additives can comprise thiadiazoles and/or sulfide aliphatic acid ester.

Suitable thiadiazoles comprises the dialkyl group thiadiazoles, including, but not limited to ashless dialkyl group thiadiazoles.Be applicable to that the dialkyl group thiadiazoles that the present invention puts into practice can be general formula (I):

R wherein ₁And R ₂Can be identical or different hydrocarbyl groups, and/or R ₁And R ₂In one can be hydrogen, and x and y can be the integer from 0-8 independently.In one aspect, R ₁And R ₂Can be identical or different, linear, branched or fragrant, saturated or unsaturated about 18 carbon atoms of about 6-that have, particularly from the hydrocarbyl group of about 12 carbon atoms of about 8-, and each x and y can be 0 or 1.

Suitable dialkyl group thiadiazoles comprises 2, two (the alkyl dithio)-1,3 of 5-, 4-thiadiazoles.The example of the dialkyl group thiadiazoles that other are fit to comprises, for example, 2, two (the alkyl sulfo-s)-1,3 of 5-, 4-thiadiazoles, 2-(uncle-alkyl dithio)-5-sulfydryl-1,3,4-thiadiazoles and two-uncle-dodecyl sulfo-thiadiazoles.

Suitable dialkyl group thiadiazoles also comprises as being described in the following file those: United States Patent (USP) 2,719, and 125,2,719,126,3,087,932,4,149,982,4,591,645 and 6,528,458, and it is described in herein and is incorporated herein by reference.The dialkyl group thiadiazoles of chemical formula (I) and the mixture of monoalkyl thiadiazoles also can use within the scope of the present invention.

As used herein, term " hydrocarbyl group " or " alkyl " use with its common implication, and it is known for those skilled in the art.Especially, it is meant such group, and it has the carbon atom that directly is bonded in the surplus portion of molecule and has main hydrocarbon feature.The example of hydrocarbyl group comprises:

(1) hydrocarbon substituent, promptly, the aliphatics substituting group (for example, alkyl or alkenyl), alicyclic substituting group (for example, cycloalkyl, cycloalkenyl group), with by the aromatic substituents of aromatic series, aliphatics and alicyclic replacement and ring family substituting group, wherein should ring by the other part (for example, two substituting groups form alicyclic group together) of this molecule and finish.

(2) substituted hydrocarbon substituent, that is, contain the substituting group of non-hydrocarbyl group, it is with regard to description in this article, do not change main hydrocarbon substituent (for example, halo (particularly chloro and fluoro), hydroxyl, alkoxyl group, sulfydryl, alkyl thiol, nitro, nitroso-group and sulphur oxygen base (sulfoxy));

(3) assorted substituting group, that is, substituting group though it has main hydrocarbon feature with regard to this description, comprises in ring or chain and do not terminate in carbon, otherwise described ring or chain is made of carbon atom.Heteroatoms comprises sulphur, oxygen, nitrogen and comprises substituting group such as pyridyl, furyl, thienyl and imidazolyl.Usually, will there be two at the most in per 10 carbon atoms in this hydrocarbyl group, or as further example, a non-hydrocarbon substituent at the most; Usually, in this hydrocarbyl group, will there be non-hydrocarbon substituent.

Perhaps, can use sulfide aliphatic acid ester, as linear C ₁₄-C ₁₈Saturated or unsaturated chain monocarboxylic ester, its be by with list, two and the sulphur part of polysulfide form crosslinked.The relative mark of different sulphur bridges depends on the relative quantity of reaction conditions and used sulphur.The lipid acid sulfurized describes in detail and sees some reference, as the Organic SulfurCompounds of L.Bateman and C.G.Moore, and the Mechanism of Sulfur Reaction of W.A.Pryor.Typical material is a sulfuration oleic acid, and its sulphur concentration is that about 5-of vulcanized oil acid esters gross weight is about 15%, and it is introduced as list and disulphide.

Select the amount of thiadiazoles or sulfide aliphatic acid ester sulphur to be added in the said composition, based on the gross weight meter of said composition with the amount of the sulphur of the about 0.5wt% of about 0.0075-.

Base oil

The embodiment of this lubricating fluid can comprise relatively large base oil.Desired base oil or lubricating oil can derive from natural lubricating oil, ucon oil and its mixture in preparation power-driven gear fluid of the present invention.Further, this base oil can comprise any suitable base oil that is used for special applications or base oil mixture.

In some embodiments, additive can provide with the form of mixed additive enriched material.Further, some embodiments can comprise thinner, for example, and thinning oil.Thinner can be included in interior to be easy to this mixed additive of blend, solubilising and transmission.This thinner can with base oil and/or this mixed additive fit.This thinner can exist with any appropriate vol in enriched material.Suitable diluent can comprise the process oil of lubricant viscosity.

The combination of additive can with significant quantity in multiple base oil in conjunction with and suitable activity component concentration is provided.Base oil is not only available from the hydrocarbon-type oil of the lubricant viscosity of oil (or tar placer, coal, shale etc.), and the natural oil of appropriate viscosity such as the polyolefin oil of vegetable seed wet goods and synthetic oil such as hydrogenation; Many alpha-olefins (for example, hydrogenation or the not alpha-olefin low polymers of hydrogenation such as the poly-1-decene of hydrogenation); The alkyl ester of dicarboxylic acid; The complex ester of dicarboxylic acid, polyoxyethylene glycol and alcohol; The alkyl ester of carbonic acid or phosphoric acid; Organosilicon polymer; Fluorocarbon oil; Mixture with the mineral of any ratio, natural and/or synthetic oil.The term " base oil " that is used for present disclosure comprises above-mentioned whole.

Therefore the combination of this additive can be used to composition, and wherein the base oil of lubricant viscosity is mineral oil, synthetic oil, natural oil such as vegetables oil, or its mixture, for example the mixture of mineral oil and synthetic oil.

Suitable mineral oil comprises refining from those of the proper viscosity of the crude oil in any source, and described source comprises Gulf Coast, Mid-continent, Pennsylvania, California, Alaska, the Middle East, the North Sea etc.The standard refinery operation can be used to process this mineral oil.The suitable oil of general type is solvent neutrals, bright stock, locomotive oil, Residual oil, hydrocracking base stock, comprises the paraffin oil of pale oil and use solvent-extracted naphthenic oil.This oil and their mixture are by many routine techniques productions, and these technology are familiar with widely for those skilled in the art.

Aforesaid, the part of one or more synthetic oils can mainly be formed or be comprised to this base oil by one or more synthetic oils.Suitable synthetic oil is about C ₂-Yue C ₁₂The carboxylicesters of the homopolymer of alkene and multipolymer, monohydroxy-alcohol and polyvalent alcohol, polyethers, siloxanes, polyoxyethylene glycol, silicon ester, alkylating aromatics, carbonic ether, thiocarbonic ester, ortho-formiate, phosphoric acid ester and phosphorous acid ester, boric acid ester and halohydrocarbon.The representative of this oil is about C ₂-Yue C ₁₂The homopolymer of monoolefine and multipolymer, alkylated benzenes (for example dodecylbenzene, two (dodecyl) benzene, tetradecyl benzene, dinonyl benzene, two-(2-ethylhexyl) benzene, wax-alkylated naphthalene); And polyphenyl (for example biphenyl, terphenyl).

Hydroxyl constitutes another kind of synthetic oil by alkylene oxide polymer, multipolymer and its derivative of modifications such as esterification, etherification endways.These are by illustrating by following: the oil that the polymerization of alkylene oxide such as ethylene oxide or propylene oxide prepares, the alkyl of these polyoxyalkylene polymers and aryl ethers are (for example, molecular-weight average is that about 1000 the poly-Isopropanediol ether of methyl, phenyl ether, the molecular weight that molecular weight is the polyoxyethylene glycol of about 500-about 1000 are the diethyl ether of the polypropylene glycol of about 1000-about 1500) or its list and polycarboxylate, for example, acetic ester, the about C of blended ₃-Yue C ₆Fatty acid ester, or the C of Tetraglycol 99 ₁₃The oxygen acid diester.

Another kind of suitable synthetic oil comprises that dicarboxylic acid (for example, phthalic acid, succsinic acid, toxilic acid, nonane diacid, suberic acid, sebacic acid, fumaric acid, hexanodioic acid, linoleic acid dimer) and various alcohol are (for example, butanols, hexanol, lauryl alcohol, 2-ethylhexyl alcohol, ethylene glycol) ester.The concrete example of these esters comprises Polycizer W 260, hexanodioic acid two (2-ethylhexyl) ester, two (dodecyl) esters of hexanodioic acid, sebacic acid two (2-ethylhexyl) ester, sebacic acid dilauryl ester, fumaric acid two-n-hexyl ester, dioctyl sebacate, diisooctyl azelate, two different decayl esters of azelaic acid, dioctyl phthalate (DOP), didecyl phthalate, two (eicosyl) esters of sebacic acid, the 2-ethylhexyl diester of linoleic acid dimer, with the multiple ester that forms by the 2 ethyl hexanoic acid reaction of the Tetraglycol 99 of the sebacic acid of 1mol and 2mol and 2mol.

The ester that can be used as synthetic oil comprises that also those are by about C ₃-Yue C ₁₂Monocarboxylic acid and polyvalent alcohol and polyol ethers make as neopentyl glycol, TriMethylolPropane(TMP), tetramethylolmethane and dipentaerythritol.Trimethylolpropane tris pelargonate and tetramethylolmethane four capronates are as an example.

Silicon-based oil, as poly-alkyl-, poly-aryl-, poly-alkoxyl group-or poly-aryloxy-silicone oil and silicic acid ester oil comprise another kind of synthetic lubricant, for example, tetraethyl orthosilicate, silicic acid four isopropyl esters, silicic acid four (2-ethylhexyl) ester, silicic acid four (p-trimethylphenylmethane base) ester, poly-(methyl) siloxanes and poly-(tolyl) siloxanes.Other synthetic lubricating oil comprise the liquid ester (for example, Tritolyl Phosphate, trioctyl phosphate, triphenyl phosphite and decane diethyl phosphonate) of phosphoric acid.

In addition as base oil or as the usefully about C of base oil component ₆-Yue C ₁₆The hydrogenation of alpha-olefin or the liquid oligomer of hydrogenation not are as the hydrogenation that formed by 1-decene or the oligopolymer of hydrogenation not.The method of producing described liquid oligomerization 1-alkene is known, and bibliographical information is arranged.See for example United States Patent (USP) 3,749,560; 3,763,244; 3,780,128; 4,172,855; 4,218,330 and 4,950,822; Its disclosure is incorporated herein by reference in this article.This mixtures of material can also be used to adjust the viscosity measurement of given base oil.As everyone knows, such hydrogenation oligopolymer comprises seldom (if any) residual olefinic unsaturates.

Suitable oligopolymer can be by using Friedel-Crafts catalyzer (particularly water or about C ₁-Yue C ₂₀The promoted boron trifluoride of alkanol) form, then the oligopolymer shortening that so forms uses the process described in the above-mentioned United States Patent (USP).

Other catalyst systems that can be used for forming 1-olefin oligomer (it provides suitable oily liq when hydrogenation) comprise Z-type catalyst such as tri-chlorination diethyl aluminum (ethyl aluminumsesquichloride) and titanium tetrachloride, aluminum alkyl catalyst, the chromium oxide catalyst on silicon-dioxide or alumina supporter and wherein after the boron trifluoride catalyst oligomerization with the system of organo-peroxide processing.

Can also use the 1-olefin oligomer of one or more liquid hydrogenation and butyraceous material bonded blend that other have appropriate viscosity according to present disclosure, condition is that the gained blend has suitable consistency and has the physicals of expectation.

This base oil can be oil, solution-air oil plant and/or its mixture that is derived from the synthetic hydrocarbon of Fischer-Tropsch.The synthetic hydrocarbon of Fischer-Tropsch is by containing H ₂Make with the synthetic gas usage charges fischer-tropsch catalyst of CO.This hydrocarbon usually needs to process further can be used as base oil.For example, hydrocarbon can be used disclosed method in the United States Patent (USP) 6,103,099 or 6,180,575 by hydroisomerization; Hydrocracking and hydroisomerization use disclosed method in the United States Patent (USP) 4,943,672 or 6,096,940; Disclosed method in the United States Patent (USP) 5,882,505 is used in dewaxing; Or hydroisomerization and dewaxing, use United States Patent (USP) 6,013,171; Disclosed method in 6,080,301 or 6,165,949.

Typically can be used as base oil or comprise Viscotrol C, sweet oil, peanut oil, rapeseed oil, Semen Maydis oil, sesame oil, oleum gossypii seminis, soya-bean oil, sunflower oil, Thistle oil, hempseed oil, Toenol 1140, tung oil, oiticica oil, Jojoba wet goods as the natural oil of base oil component.If desired, this oil can be by hydrogenation partially or even wholly.

Be used for present disclosure composition base oil can by (i) one or more mineral oil, (ii) one or more synthetic oils, (iii) one or more natural oils or (iv) (i) and (ii) or (i) and (iii) or (ii) and (iii) or the fact formed of mixture (i), (ii) and (iii) do not mean that these various types of oil are the equivalent equivalence thing inevitably.The base oil of some type can be used to some composition, because they have specific performance properties such as high-temperature stability, uninflammability or to specific metal (for example silver or cadmium) non-corrosiveness.In other compositions, the base oil of other types is fit to, and this is because availability or reason cheaply.Therefore, can be used to various embodiments, their uninevitable all mutual function equivalences in all cases though those skilled in the art will recognize that various types of above-mentioned base oils.

Using method

Compositions of additives of the present invention and/or lubricating fluid can be used for the method for lubricated automatic driver, and, more particularly, be used for the method for lubricated DCT as the DCT that uses a plurality of humid clutches and no torque converter.

Method of the present invention comprises uses the lubricating fluid lubrication gear, and described lubricating fluid comprises:

(a) ashless dispersant;

(b) friction modifiers of friction improvement amount; With

(c) phosphonic acid ester.

This fluid does not have zinc basically and can provide improved steel in the friction on the steel, the stable friction of steel on paper and/or good synchronizer performance.

Embodiment

The fluid that preparation is used to test in the target base stock.By being added in ratio as follows, component prepares the fluid of preparation fully:

Table 1

Wear-resistant/anti-extreme pressure agent	0.05-1.0％
		Antioxidant	0.1-0.6％
Rust-preventive agent	0.01-0.2％
		DMOP	0.10-0.6％
Antifoams	0.01-0.1％
		Friction modifiers	0.3-1.0％
Dispersant A	1-6％
		Sealed expander	0-10％
Polymethacrylate VII	3-25％
		Base stock	60-90％
Thinning oil	2-5％

Used dispersion agent is a succinimide dispersants, and it can maybe cannot comprise boron and/or phosphorus.Friction modifiers is to have C ₁₈-C ₂₄The succinimide of alkenyl.DMOP is the octadecyl dimethyl phosphonate.Other friction modifiers can be used to adapt to (tailor) friction requirement.

Dispersion agent and friction modifiers provide suitable torque capacity (torque capacity).The fluid composition that contains dispersion agent and succinimide friction modifiers has been developed and good friction durability is provided.Fig. 1 is the comparison of rubbing characteristics that contains the fluid A (table 2) of succinimide dispersants and succinimide friction modifiers: rubbing characteristics before and after the thermal ageing.

Thermal ageing is to be undertaken by reach 192 hours at 160 ℃ of these fluids of heating in the round-bottomed flask of equipment mechanical stirrer.As seen this fluid can be stood thermal stresses, because be subjected to the fluid of thermal stresses to show good friction durability and kept friction level and the slope characteristic that can compare with fresh fluid.

The composition of table 2 fluid A

Component	Amount, wt%
		Antioxidant	0.1-0.5
Stain remover	0.1-0.6
		Rust-preventive agent	0-0.2
Wear-resistant/anti-extreme pressure agent	0.05-1.0
		Smoothing agent	0.1-1.0
Antifoams	0.02-1.0
		Amine friction modifiers 1	0.02-0.15
Amine friction modifiers 2	0.02-0.1
		The succinimide friction modifiers	0.1-0.8
The succinimide dispersants of boration, phosphorylation	2.00-7.5
		Ethoxylated alcohol	0.01-0.5
Process oil	0.10-1.50
		Base oil	To 100%
Amount to	100.0

The stain remover that is used for composition is high alkalinity C ₁₄-C ₂₄Alpha-olefin calcium sulphonate stain remover.Friction modifiers is to have C ₁₈-C ₂₄The succinimide of alkenyl.DMOP is the octadecyl dimethyl phosphonate.Provided fabulous synchronizer performance with DMOP bonded friction modifiers.

Fluid (table 3) matrix that comprises two types anti-wear agent, dispersion agent, friction modifiers and base stock shows that identical friction modifiers in synthetic fluid/DMOP combination can provide fabulous synchronizer performance, it provides 100,000 cycle indexes in the SSP-180 synchronizer test that uses the brass cone.

The SSP-180 testing table is to develop in the GearResearch Institute of Technical University of Munich.It can fix and test a complete set of synchromesh gear (diameter is the highest 180 millimeters) according to selected manual drive.Simulated and the relevant load condition of normal transmission mechanism use at duration of test.Testing table comprises electric motor, two fly wheel governors, primer fluid pressure device, oily heating and the recycle system and test boxs.By band and pulley combination, big main fly wheel governor is connected to electric motor to guarantee constant and the steady speed source.Little fly wheel governor is a load, and this synchronizer makes this load arrive zero velocity (being converted into " A " position) or makes it accelerate to constant speed (being converted into " B " position).This is to be finished by two rings and the cone synchronizer that are fixed in the test box.Posterior means makes this load fly wheel governor accelerate to synchronous speed, and anterior device makes fly wheel governor be decelerated to zero velocity.The primer fluid pressure device moves shift fork, and this shift fork meshes a device and breaks away from another device.In the process of stirring, the lubricant that is heated is sprayed onto on two synchromesh gears.Make thousands of wearing qualities of these device engagements with the test synchronizer (reorganization from: Http:// www.swri.org/3PUBS/BROCHURE).

Table 3 contains friction modifiers/DMOP fluidic synchronizer performance

Matrix	1	2	3	4	5	6	7	8
									Base oil	Synthetic oil	Mineral oil	Mineral oil	Synthetic oil	Synthetic oil	Mineral oil	Synthetic oil	Mineral oil
GO-10631-	1100	1200	1300	1400	1500	1600	1700	1800
									AW	ZDDP	Phosphorous acid	ZDDP	ZDDP	Phosphorous acid	ZDDP	Phosphorous acid	Phosphorous acid
The AW level	1500	1500	1500	300	1500	300	300	300
									Dispersion agent	Succinimide dispersants	The boration succinimide dispersants	The boration succinimide dispersants	The boration succinimide dispersants	Succinimide dispersants	Succinimide dispersants	The boration succinimide dispersants	Succinimide dispersants
Dispersant level	0.5	0.5	5	5	5	0.5	0.5	5
									Detergent level	1.5	1.5	0.35	1.5	0.35	0.35	0.35	1.5
The FM type	The ethoxylated amine friction modifiers	Succinimide friction modifiers+DMOP	ATF	Succinimide friction modifiers+DMOP	Succinimide friction modifiers+DMOP	Succinimide friction modifiers+DMOP	The ethoxylated amine friction modifiers	The ethoxylated amine friction modifiers
									Base oil	Synthetic oil	Mineral oil	Mineral oil	Synthetic oil	Synthetic oil	Mineral oil	Synthetic oil	Mineral oil
Circulation	83,278	67,077	21,157	100,000	100,000	100,000	49,327	43,867
									Average abrasion	0.785	1.0565	1.17	0.615	0.3565	0.4365	0.975	0.995
High wearing and tearing	1.107	1.1	1.1785	0.72	0.437	0.49	1.06	1.28
									Average COF	0.093	0.077	0.08	0.0875	0.109	0.0945	0.0815	0.098
Low COF	0.084	0.064	0.068	0.084	0.106	0.094	0.066	0.09
									Average Sp wearing and tearing	0.094	0.158	0.553	0.062	0.036	0.044	0.198	0.227
Maximum Sp wearing and tearing	0.133	0.151	0.561	0.072	0.044	0.049	0.215	0.292

Except help good synchronizer performance and wear-resistant protectiveness in synchronizer test, DMOP also provides fabulous extreme pressure performance, as using Falex EP (extreme pressure) and 4-ball extreme pressure test to measure according to ASTM D-3233 and D-2783 respectively.ASTM D-3233 performance is measured by determining threshold load, and at described load, test face stops, and this is owing to giving the load that fixed temperature applied.ASTM D-2783 measures the juncture of relative 3 steel balls that fixedly ball rotated.Table 4 shows that 0.25% DMOP compares improved performance with the composition of similar no DMOP.

Table 4

DMOP(wt％)	Falex EP D-3233 interruptible loads (@100 ℃ of pound)	Falex EP D-3233 interruptible loads (@150 ℃ of pound)	4-ball EP ASTM D-2783
				0.25	2125	2000	260Kg engages
0.00	1250	1000	210Kg engages

All use as institute in specification sheets and the claim, indefinite article " a " and/or " an " can refer to one or more than one.Unless otherwise stated, whole numerical value of used expression composition, performance quantity such as molecular weight, per-cent, ratio, reaction conditions etc. should be understood according to being modified by term " about " in all instances in specification sheets and claims.Therefore, unless point out on the contrary, the numerical parameter described in specification sheets and the claim is an approximation, and it can change according to the performance that present disclosure is managed the expectation that will obtain.At least, be not the application of wishing restriction claim scope doctrine of equivalents, each numerical parameter should be understood according to the numerical value of the significant figure of being reported with by the choice method of routine at least.Although the numerical range of present disclosure wide region and parameter are approximations, accurately provided as much as possible at the numerical value described in the specific embodiment.Yet any numerical value comprises some error inherently, and it is produced by the standard deviation that it exists in test determination separately inevitably.

Though explanation and embodiment have described present disclosure in detail by way of example, should be understood that embodiment allows various modification and alternative form, and are not limited to described particular.Should be understood that these specific embodiments are not intended to limit the present invention, but expectation covers whole modification, Equivalent and the alternatives (alternative) that belongs to spirit and scope of the invention on the contrary.

Claims (10)

1. method with the lubricated double clutch transmissions of lubricating fluid, this method comprises that described do not have the lubricating fluid of zinc to comprise basically with the step of the lubricated double clutch transmissions of the lubricating fluid that does not have zinc basically:

(a) ashless dispersant;

(b) friction modifiers;

(c) phosphonic acid ester; With

(d) base oil.

2. the process of claim 1 wherein that this dispersion agent comprises three valent phosphors and boron.

3. the method for claim 2, wherein this dispersion agent comprises three valent phosphors altogether and the boron of the highest about 400ppm.

4. the process of claim 1 wherein that this phosphonic acid ester is selected from the phosphonic acid ester with following chemical formula:

R wherein ¹Be alkyl or the alkenyl that comprises about 30 carbon atoms of about 12-, and R wherein ²And R ³Be hydrogen, alkyl or alkenyl independently of one another.

5. the process of claim 1 wherein that this lubricating composition comprises the phosphonic acid ester of the about 3wt% of about 0.05-, based on the gross weight meter of this lubricating composition.

6. double clutch transmissions fluid comprises:

(a) ashless dispersant;

(b) friction modifiers;

(c) phosphonic acid ester; With

(d) base oil,

Wherein this double clutch transmissions fluid does not have zinc basically.

7. the transmission mechanism fluid of claim 6, wherein this dispersion agent comprises three valent phosphors and boron.

8. the transmission mechanism fluid of claim 7, wherein this dispersion agent comprises three valent phosphors altogether and the boron of the highest about 400ppm.

9. the transmission mechanism fluid of claim 6, wherein this phosphonic acid ester is selected from the phosphonic acid ester with following chemical formula:

R wherein ¹Be alkyl or the alkenyl that comprises about 30 carbon atoms of about 12-, and R wherein ²And R ³Be hydrogen, alkyl or alkenyl independently of one another.

10. the transmission mechanism fluid of claim 6, wherein this lubricating composition comprises the phosphonic acid ester of the about 3wt% of about 0.05-, based on the gross weight meter of this lubricating composition.

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